CN112729660A

CN112729660A - Double-channel pressure sensitive core

Info

Publication number: CN112729660A
Application number: CN202110337038.8A
Authority: CN
Inventors: 尤心旺; 唐志祥; 梁峭; 李圣华; 张琪
Original assignee: Nanjing Temin Sensor Technology Co ltd
Current assignee: Nanjing Temin Sensor Technology Co ltd
Priority date: 2021-03-30
Filing date: 2021-03-30
Publication date: 2021-04-30
Anticipated expiration: 2041-03-30
Also published as: CN112729660B

Abstract

The invention relates to the technical field of pressure sensing detection, in particular to a double-channel pressure sensitive core, wherein a diaphragm is fixedly welded and installed on the upper end surface of an outer cover body; the upper end face of the diaphragm is fixedly welded with a circular ring; the upper end surface of the circular ring is fixedly welded with a transition ring; the outer side wall of the transition ring is sleeved with a filter cover; arc-shaped blocks are symmetrically and fixedly welded on the lower bottom surface of the outer cover body; the upper surface of the outer cover body is provided with an assembly groove; mounting holes are formed in the bottom surface of the assembling groove at intervals in a penetrating manner; a ceramic pad is arranged in the assembling groove; sintered glass is fixedly arranged in the mounting hole; the upper end surface of the sintered glass is attached to the lower bottom surface of the ceramic pad; the upper surface of the ceramic pad is provided with a groove; the dual-channel pressure sensitive core body provided by the invention has the advantages of reasonable structural design, stable and firm connection of internal circuits, strong applicability to complex environments, capability of rapidly switching signals of dual chip structures with each other and high fault-tolerant rate.

Description

Double-channel pressure sensitive core

Technical Field

The invention belongs to the technical field of pressure sensing detection, and particularly relates to a dual-channel pressure sensitive core body.

Background

The pressure sensing core body is a device capable of detecting the pressure of gas and liquid in the environment, when a product operates, the external pressure is transmitted to the internal pressure chip through a diaphragm on the device, the chip utilizes the piezoresistive effect to enable the surface resistance of the chip to change in a certain proportion with the external pressure, voltage output signals are obtained through bridge type resistance measurement, then the signals output by the chip are transmitted to an external display device through a lead, and the pressure is obtained. The existing equipment has a complex and disorderly structure, occupies large space for installing equipment and is inconvenient for equipment production and assembly; the inlet port of the induction medium is an open filter-free processing structure, so that blockage is easy to occur, and the detection accuracy is influenced; moreover, the equipment line is usually directly led out from the inside for connection, and when the external operation is excessively forced to pull or the installation force is excessively large, the line and an internal chip are separated from each other, so that the equipment is damaged; in addition, the built-in pressure sensing chip is too single, and pressure measurement cannot be carried out when the internal chip is damaged, so that the internal parameter state of the detection environment cannot be known in real time, and certain potential safety hazards can be brought.

Disclosure of Invention

The invention aims to provide a double-channel pressure sensitive core body which has the advantages of reasonable structural design, stable and firm connection of internal circuits, strong applicability to complex environments, capability of rapidly switching signals of double chip structures with each other and high fault-tolerant rate.

In order to achieve the purpose, the invention provides the following technical scheme: a double-channel pressure sensitive core body comprises an outer cover body, wherein a diaphragm is fixedly welded on the upper end face of the outer cover body; the upper end face of the diaphragm is fixedly welded with a circular ring; the upper end face of the circular ring is fixedly welded with a transition ring; the outer side wall of the transition ring is sleeved with a filter cover; arc-shaped blocks are symmetrically and fixedly welded on the lower bottom surface of the outer cover body; an assembly groove is formed in the upper surface of the outer cover body; mounting holes are formed in the bottom surface of the assembling groove at intervals in a penetrating manner; a ceramic pad is arranged in the assembling groove; sintered glass is fixedly arranged in the mounting hole; the upper end surface of the sintered glass is attached to the lower bottom surface of the ceramic pad; a groove is formed in the upper surface of the ceramic pad; the bottom surface of the groove is symmetrically embedded with a main chip and a standby chip; the ceramic pad is also provided with threading holes at intervals in a through way; a lead is arranged in the ceramic pad in a penetrating way; the signal access end of the lead is positioned in the threading hole; gold wires are connected and mounted between the main chip and the standby chip and the leads; an oil filling hole is formed in the bottom surface of the assembling groove in a penetrating mode; the lower end of the oil injection hole is provided with a steel ball; a lower groove is formed in the lower bottom surface of the outer cover body; an annular groove is formed in the outer side wall of the outer cover body; springs are horizontally arranged in the annular groove at intervals; the front end of the spring is fixedly provided with an extrusion plate; the inner side wall of the transition ring is provided with a conical buffer platform; the upper end of the conical buffer table is provided with a liquid inlet hole in a run-through mode; and the outer side wall of the transition ring and the inner side wall of the filter cover are provided with threads matched with each other.

As a further improvement of the invention, the inner side wall of the arc-shaped block is provided with a connecting plate in a butt joint way; a clamping plate is arranged on the inner side of the connecting plate; an adjusting bolt is arranged between the arc-shaped block and the connecting plate in a through connection way; the lower end of the lead is positioned between the arc-shaped block and the clamping plate.

As a further improvement of the invention, the main chip and the spare chip are both silicon piezoresistive sensitive chips.

As a further improvement of the invention, a filter screen is embedded and installed on the upper end surface of the filter cover.

As a further improvement of the invention, the clamp plate adopts a semi-circular arc-shaped rubber block.

As a further improvement of the invention, the outer cover body, the diaphragm, the circular ring, the transition ring, the filter cover and the arc-shaped block are all made of stainless steel materials.

As a further improvement of the invention, the interior of the lower groove is filled with waterproof sealing glue.

As a further improvement of the invention, the connecting plate is made of an elastic steel sheet or an elastic plastic sheet.

Compared with the prior art, the beneficial technical effects of the invention comprise the following: according to the technical scheme, the annular groove is formed in the outer cover body, the spring and the extrusion plate are arranged in the annular groove, the outer shell can be effectively and stably clamped in the installation equipment through the matching of the spring and the extrusion plate, and the technical effects that the equipment installation convenience can be improved and the equipment can be prevented from shaking randomly are achieved; according to the technical scheme, the arc-shaped block is arranged on the outer cover body, the connecting plate is arranged on the arc-shaped block, the clamping plate is arranged on the connecting plate, the adjusting bolt is arranged between the arc-shaped block and the connecting plate, and the adjusting bolt is screwed up through the extrusion fit between the arc-shaped block and the clamping plate, so that the led-out lead wire can be effectively pressed and fixed, and the lead wire is prevented from falling off due to pulling; according to the technical scheme, the transition ring is arranged on the circular ring, the conical buffer table is arranged in the transition ring, the entering flow velocity of the measuring medium can be effectively buffered through the conical buffer table, and the damage to internal equipment caused by the fact that the entering speed is too high is avoided; according to the technical scheme, the transition ring is provided with the filter cover, the transition ring and the filter cover are provided with the threads which are matched with each other, the filter cover is provided with the filter screen, the filter screen can filter impurities encountered in a detection medium environment, the influence of the impurities on detection accuracy is reduced, and the transition ring is connected with the filter cover through the threads, so that the replacement and disassembly operation is convenient; this technical scheme ceramic pad is provided with main chip and spare chip, and main chip and spare chip all can be solitary carry out the transmission between the signal, can carry out the switching of detection signal fast when meetting single sudden failure, can avoid the chip alone to appear damaging just so directly causing the problem that equipment can't continue to operate, can effectively improve the fault-tolerant rate and the safety and stability operating performance of equipment.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic view of an exploded structure of the present invention.

FIG. 3 is an enlarged schematic view of the ceramic pad of the present invention.

Fig. 4 is a schematic view of the internal structure of the outer cover of the present invention.

Fig. 5 is an enlarged schematic view of a lower arcuate block of the present invention.

FIG. 6 is an enlarged cross-sectional view of the inner portion of the transition ring of the present invention

In the figure: 1. an outer cover body; 2. a membrane; 3. a circular ring; 4. a transition ring; 5. a filter housing; 6. an arc-shaped block; 7. assembling a groove; 8. mounting holes; 9. a ceramic pad; 10. sintering glass; 11. a groove; 12. a main chip; 13. a spare chip; 14. threading holes; 15. a lead wire; 16. gold wire; 17. an oil filler hole; 18. steel balls; 19. a lower groove; 20. an annular groove; 21. a spring; 22. a pressing plate; 23. a connecting plate; 24. a wire clamping plate; 25. adjusting the bolt; 26. a conical buffer table; 27. a liquid inlet hole; 28. a thread; 29. and (4) a filter screen.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 6, the present invention provides a technical solution: a double-channel pressure sensitive core comprises an outer cover body 1, wherein a diaphragm 2 is fixedly welded on the upper end face of the outer cover body 1; the upper end face of the diaphragm 2 is fixedly welded with a circular ring 3; the upper end surface of the circular ring 3 is fixedly welded with a transition ring 4; the outer side wall of the transition ring 4 is sleeved with a filter cover 5; the lower bottom surface of the outer cover body 1 is symmetrically fixedly welded with arc-shaped blocks 6; an assembly groove 7 is formed in the upper surface of the outer cover body 1; mounting holes 8 are formed in the bottom surface of the assembling groove 7 at intervals in a penetrating manner; a ceramic pad 9 is arranged in the assembling groove 7; the sintered glass 10 is fixedly arranged in the mounting hole 8; the upper end surface of the sintered glass 10 is attached to the lower bottom surface of the ceramic pad 9; the upper surface of the ceramic pad 9 is provided with a groove 11; the bottom surface of the groove 11 is symmetrically embedded with a main chip 12 and a spare chip 13; the ceramic pad 9 is also provided with threading holes 14 at intervals; a lead 15 is installed inside the ceramic pad 9 in a penetrating way; the signal access end of the lead 15 is positioned in the threading hole 14; a gold wire 16 is connected and mounted between the main chip 12 and the standby chip 13 and the lead 15; an oil filling hole 17 is formed in the bottom surface of the assembling groove 7 in a penetrating mode; the lower end of the oil injection hole 17 is provided with a steel ball 18; a lower groove 19 is formed on the lower bottom surface of the outer cover body 1; an annular groove 20 is formed on the outer side wall of the outer cover body 1; the spring 21 is horizontally arranged in the annular groove 20 at intervals; the front end of the spring 21 is fixedly provided with a squeezing plate 22; the inner side wall of the arc-shaped block 6 is provided with a connecting plate 23 in a butt joint way; a clamping plate 24 is arranged on the inner side of the connecting plate 23; an adjusting bolt 25 is arranged between the arc block 6 and the connecting plate 23 in a through connection way; the lower end of the lead 15 is positioned between the arc-shaped block 6 and the clamping plate 24; the inner side wall of the transition ring 4 is provided with a conical buffer platform 26; the upper end of the conical buffer table 26 is provided with a liquid inlet hole 27 in a run-through way; the outer side wall of the transition ring 4 and the inner side wall of the filter cover 5 are provided with threads 28 which are matched with each other; a filter screen 29 is embedded and installed on the upper end surface of the filter cover 5; the outer cover body 1, the diaphragm 2, the circular ring 3, the transition ring 4, the filter cover 5 and the arc-shaped block 6 are all made of stainless steel materials; the lower groove 19 is filled with waterproof sealing glue.

When the equipment is installed in a use place to work, an external medium in an environment to be measured firstly filters impurities through a filter screen 29, the filtered medium is buffered through a conical buffer table 26 and then enters the circular ring 3 through a liquid inlet hole 27, the pressure of the external medium is transmitted to the main chip 12 and the standby chip 13 through the diaphragm 2, the main chip 12 and the standby chip 13 perform signal conversion on the pressure value, and finally the signal is transmitted out through the lead 15; the arc-shaped block 6 and the clamping plate 24 can firmly extrude and fix the lead 15 under the action of the elastic connecting plate and the adjusting bolt 25, so that the lead is prevented from loosening and affecting the normal work of the equipment.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A dual channel pressure sensitive core characterized by: the mask comprises an outer mask body (1), wherein a diaphragm (2) is fixedly welded on the upper end face of the outer mask body (1); the upper end face of the diaphragm (2) is fixedly welded with a circular ring (3); a transition ring (4) is fixedly welded on the upper end surface of the circular ring (3); the outer side wall of the transition ring (4) is sleeved with a filter cover (5); arc-shaped blocks (6) are symmetrically and fixedly welded on the lower bottom surface of the outer cover body (1); an assembly groove (7) is formed in the upper surface of the outer cover body (1); mounting holes (8) are formed in the bottom surface of the assembling groove (7) at intervals in a penetrating manner; a ceramic pad (9) is arranged in the assembling groove (7); sintered glass (10) is fixedly arranged in the mounting hole (8); the upper end surface of the sintered glass (10) is attached to the lower bottom surface of the ceramic pad (9); a groove (11) is formed in the upper surface of the ceramic pad (9); the bottom surface of the groove (11) is symmetrically embedded with a main chip (12) and a spare chip (13); threading holes (14) are also formed in the ceramic pad (9) at intervals in a penetrating manner; a lead (15) is installed in the ceramic pad (9) in a penetrating way; the signal access end of the lead (15) is positioned in the threading hole (14); a gold wire (16) is connected and mounted between the main chip (12) and the standby chip (13) and the lead (15); an oil filling hole (17) is formed in the bottom surface of the assembling groove (7) in a penetrating mode; the lower end of the oil filling hole (17) is provided with a steel ball (18); a lower groove (19) is formed in the lower bottom surface of the outer cover body (1); an annular groove (20) is formed in the outer side wall of the outer cover body (1); springs (21) are horizontally arranged in the annular groove (20) at intervals; the front end of the spring (21) is fixedly provided with a squeezing plate (22); a conical buffer table (26) is mounted on the inner side wall of the transition ring (4); a liquid inlet hole (27) is formed in the upper end of the conical buffer table (26) in a penetrating mode; and the outer side wall of the transition ring (4) and the inner side wall of the filter cover (5) are provided with threads (28) which are matched with each other.

2. The dual channel pressure sensitive core of claim 1, wherein: the inner side wall of the arc-shaped block (6) is provided with a connecting plate (23) in a butt joint mode; a clamping plate (24) is arranged on the inner side of the connecting plate (23); an adjusting bolt (25) is arranged between the arc-shaped block (6) and the connecting plate (23) in a through connection way; the lower end of the lead (15) is positioned between the arc-shaped block (6) and the clamping plate (24).

3. The dual channel pressure sensitive core of claim 1, wherein: the main chip (12) and the spare chip (13) are silicon piezoresistive sensitive chips.

4. The dual channel pressure sensitive core of claim 1, wherein: and a filter screen (29) is embedded in the upper end surface of the filter cover (5).

5. The dual channel pressure sensitive core of claim 1, wherein: the clamp plate (24) is made of a semi-circular arc-shaped rubber block.

6. The dual channel pressure sensitive core of claim 1, wherein: the outer cover body (1), the diaphragm (2), the circular ring (3), the transition ring (4), the filter cover (5) and the arc-shaped block (6) are all made of stainless steel materials.

7. The dual channel pressure sensitive core of claim 1, wherein: and sealing waterproof glue is filled in the lower groove (19).

8. The dual channel pressure sensitive core of claim 2, wherein: the connecting plate (23) is made of an elastic steel sheet or an elastic plastic sheet.